New Lines arn’t showing up??

Well, i think its the theme, but whenever i write a post, then i have a new like like this :

This is just an example of

what im talking about.

it shows up like this :

this is just what is
happening im trying to fix it

(the line isn’t showing up in the middle on the second one, i want it to)

I know i can just add
in the html but it gets a bit boring after a while when the template should be doing it by itself. I think the problem may be in the single.php, but im not sure so could someone tell me what to post here if its not single.php

Single.php

<?php include(TEMPLATEPATH."/config.inc.php");?>
<?php get_header(); ?>

<div class="container">
<div id="leftcolumn">
<div id="leftcolumn_top"></div>

  <?php if (have_posts()) : ?>
  <?php while (have_posts()) : the_post(); ?>
  <div class="post" id="post-<?php the_ID(); ?>">
      <div class="title">
        <h2><?php the_title(); ?></h2>
          <div class="date"><?php the_time('M j, Y'); ?></div>
      </div>
    <div class="clearer"></div>
    <?php the_content() ; ?>
    <!-- end .entry -->
  <div class="postdata">
    by <?php the_author_posts_link(); ?> |
    Categories: <?php the_category(', '); ?> | <?php the_tags(__('Tagged: '), ", ", " |") ?>
    <?php edit_post_link('Edit', ' / ', ' / '); ?>
  </div>
  </div>
  <!-- end .post -->
  <div class="inside_subpost"> <a href="<?php if($db_feedburner_address) { echo $db_feedburner_address; } else { bloginfo('rss2_url'); }?>" class="related_rss_icon"></a>
    <div class="related_rss"><strong>Enjoyed this article? Subscribe to the full <a href="<?php if($db_feedburner_address) { echo $db_feedburner_address; } else { bloginfo('rss2_url'); }?>">RSS Feed</a></strong>
      <?php if ('open' == $post-> ping_status) { ?>
      <?php } ?>
    </div>

<h3>Share with others</h3>

<div class="social">
<script type="text/javascript"
	src="https://d.yimg.com/ds/badge2.js"
	badgetype="square">
	ARTICLEURL
</script>
</div>

<div class="social">
 	<a href="https://digg.com/submit?url=<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<img src="https://digg.com/img/badges/32x32-digg-guy.gif" width="32" height="32" alt="Digg!" />
</a>
</div>

<div class="social">
<script>reddit_url='<?php get_option('home'); ?>'</script>
<script>reddit_title='<?php the_title(); ?>'</script>
<script type="text/javascript" src="https://www.reddit.com/button.js?t=3"></script>
</div>

<div class="social">
<a href="https://www.stumbleupon.com/submit?url=<?php the_permalink(); ?>" title="<?php the_title(); ?>">
<img border="0" src="https://www.stumbleupon.com/images/small_su_logo.png" alt="StumbleUpon" />
</a>
</div>

    <div class="clear"></div>
  </div>
  <div class="post" id="commentArea">
    <?php comments_template(); ?>
  </div>
  <?php endwhile; ?>
  <div class="pagers">
    <?php next_posts_link('&laquo; Older Entries') ?>
    <?php previous_posts_link('Newer Entries &raquo;') ?>
  </div>
  <?php else : ?>
  <div class="post">
    <h2>Not Found</h2>
    <p>Sorry, but you are looking for something that isn't here.</p>
  </div>
  <?php endif; ?>

  				<div id="singleNav">
					<div class="previous"><?php previous_post_link(__('&laquo; %link', 'blogtxt')) ?></div>
					<div class="next"><?php next_post_link(__('%link &raquo;', 'blogtxt')) ?></div>
				</div>

    <div class="clear"></div>

<div id="leftcolumn_bot"></div>
</div>
<!-- end #leftcolumn -->
<?php get_sidebar(); ?>
<?php get_footer(); ?>